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NEWS: add another batch of entries
This commit is contained in:
Zbigniew Jędrzejewski-Szmek
parent
2df225294f
commit
4a77c53d64
76
NEWS
76
NEWS
@ -5,6 +5,36 @@ CHANGES WITH 232 in spe
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* The new RemoveIPC= option can be used to remove IPC objects owned by
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the user or group of a service when that service exits.
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* ProtectSystem= option gained a new value "strict", which causes the
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whole file system tree with the exception of /dev, /proc, and /sys,
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to be remounted read-only for a service.
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The new ProtectedKernelTunables= options can be used to disable
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modification of configuration files in /sys and /proc by a service.
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Various directories and files are remounted read-only, so access is
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restricted even if the file permissions would allow it.
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The new ProtectControlGroups= option can be used to disable write
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access by a service to /sys/fs/cgroup.
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* Various systemd services have been hardened with
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ProtectKernelTunables=yes, ProtectControlGroups=yes,
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RestrictAddressFamilies=.
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In particular, systemd-udevd.service is now run in a Seccomp-based
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sandbox that prohibits access to AF_INET and AF_INET6 sockets and
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thus access to the network. This might break code that runs from udev
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rules that tries to talk to the network. Doing that is generally a
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bad idea and unsafe due to a variety of reasons. It's also racy as
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device management would race against network configuration. It is
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recommended to rework such rules to use the SYSTEMD_WANTS property on
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the relevant devices to pull in a proper systemd service (which can
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be sandboxed differently and ordered correctly after the network
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having come up). If that's not possible consider reverting this
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sandboxing feature locally by removing the RestrictAddressFamilies=
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setting from the systemd-udevd.service unit file, or adding AF_INET
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and AF_INET6 to it.
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* Support for dynamically creating users for the lifetime of a service
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has been added. If DynamicUser=yes is specified, user and group IDs
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will be allocated from the range 61184..65519 for the lifetime of the
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@ -12,7 +42,9 @@ CHANGES WITH 232 in spe
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module. The module must be enabled in /etc/nsswitch.conf. Services
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started in this way have PrivateTmp= and RemoveIPC= enabled, so that
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any resources allocated by the service will be cleaned up when the
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service exits.
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service exits. They also have ProtectHome=read-only and
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ProtectSystem=strict enabled, so they are not able to make any
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permanent modifications to the system.
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The nss-systemd module also always resolves root and nobody, making
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it possible to have no /etc/passwd or /etc/group files in minimal
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@ -54,7 +86,7 @@ CHANGES WITH 232 in spe
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mount the EFI partition on systems where /boot is used for something
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else.
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* disk/by-id symlinks are now created for NVMe drives.
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* disk/by-id and disk/by-path symlinks are now created for NVMe drives.
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* Two new user session targets have been added to support running
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graphical sessions under the systemd --user instance:
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@ -93,6 +125,9 @@ CHANGES WITH 232 in spe
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* systemd-run gained a new --wait option that makes service execution
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synchronous.
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systemctl gained a new --wait option that causes the start command to
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wait until the units being started have terminated again.
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* A new journal output mode "short-full" has been added which uses
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timestamps with abbreviated English day names and adds a timezone
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suffix. Those timestamps include more information and can be parsed
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@ -106,6 +141,12 @@ CHANGES WITH 232 in spe
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from a single IP can be limited with MaxConnectionsPerSource=,
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extending the existing setting of MaxConnections.
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* systemd-networkd gained support for vcan ("Virtual CAN") interface
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configuration.
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* .netdev and .network configuration can now be extended through
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drop-ins.
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* UDP Segmentation Offload, TCP Segmentation Offload, Generic
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Segmentation Offload, Generic Receive Offload, Large Receive Offload
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can be enabled and disabled using the new UDPSegmentationOffload=,
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@ -118,6 +159,10 @@ CHANGES WITH 232 in spe
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new STP=, Priority=, AgeingTimeSec=, and DefaultPVID= settings in the
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[Bridge] section of .netdev files.
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The route table to which routes received over DHCP or RA should be
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added can be configured with the new RouteTable= option in the [DHCP]
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and [IPv6AcceptRA] sections of .network files.
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Address Resolution Protocol can be disabled on links managed by
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systemd-networkd using the ARP=no setting in the [Link] section of
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.network files.
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@ -125,11 +170,24 @@ CHANGES WITH 232 in spe
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* $SERVICE_RESULT, $EXIT_CODE, $EXIT_STATUS are set for ExecStop= and
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ExecStopPost= commands.
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* systemd-sysctl will now configure kernel parameters in the order
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they occur in the configuration files. This mathes what sysctl
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has been traditionally doing.
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* kernel-install "plugins" that are executed to perform various
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tasks after a new kernel is added and before an old one is removed
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can now return a special value to terminate the procedure and
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prevent any later plugins from running.
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* Journald's SplitMode=login setting has been deprecated. It has been
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removed from documentation, and it's use is discouraged. In a future
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release it will be completely removed, and made equivalent to current
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default of SplitMode=uid.
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* Storage=both option setting in /etc/systemd/coredump.conf has been
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removed. With fast LZ4 compression storing the core dump twice is not
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useful.
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* The --share-system systemd-nspawn option has been replaced with an
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(undocumented) variable $SYSTEMD_NSPAWN_SHARE_SYSTEM, but the use of
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this functionality is discouraged. In addition the variables
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@ -137,20 +195,6 @@ CHANGES WITH 232 in spe
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$SYSTEMD_NSPAWN_SHARE_NS_UTS may be used to control the unsharing of
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individual namespaces.
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* systemd-udevd.service is now run in a Seccomp-based sandbox that
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prohibits access to AF_INET and AF_INET6 sockets and thus access to
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the network. This might break code that runs from udev rules that
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tries to talk to the network. Doing that is generally a bad idea and
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unsafe due to a variety of reasons. It's also racy as device
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management would race against network configuration. It is
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recommended to rework such rules to use the SYSTEMD_WANTS property on
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the relevant devices to pull in a proper systemd service (which can
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be sandboxed differently and ordered correctly after the network
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having come up). If that's not possible consider reverting this
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sandboxing feature locally by removing the RestrictAddressFamilies=
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setting from the systemd-udevd.service unit file, or adding AF_INET
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and AF_INET6 to it.
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CHANGES WITH 231:
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* In service units the various ExecXYZ= settings have been extended
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